What is 'Fantastic Beasts and Where to Find Them: The Original Screenplay' about?

The story opens in 1926 as Newt Scamander, has just completed a global excursion to find and document an extraordinary array of magical creatures. Arriving in New York for a brief stopover, he might have come and gone without incident…were it not for a No-Maj (American for Muggle) named Jacob, a misplaced magical briefcase, and the escape of some of Newt’s fantastic beasts, which could spell trouble for both the wizarding and No-Maj worlds.